Chapter 3 Notes - Networking
Why is a MAC address 48 bits
The first three parts are the vendor. And the other three parts are what the vendor or manufacturer assigns to make the address unique
Who assigns a APIPA?
The host
What layer does IP addresses identifying Nodes?
The network layer
What is the 1st part of the MAC address known as?
The organizationally unique identifier
What layer is TCP / IP associated with
The transport layer (Layer 4)
What do routers check for?
They check for IP addresses to determine which network a message is supposed to go to
How do nodes find other nodes?
They use their MAC address
Which of the following is a Class C Private IP address?
192.168.0.10
What is the Subnet Mask for a Classful Class A IP range?
255.0.0.0
What would the subnet mask be of the follow network range?
255.255.255.240
How many bits is a MAC address
48 bits
What is a virtual machine?
A piece of software that runs on a piece of hardware. The nice thing is multiple virtual machines can run on the same piece of hardware.
What is a subnet mask?
A subnet mask divides an IP address into two different parts
What's the difference between an IP address and a transport layer port?
A transport layer port looks for ports associated with application while the IP address is assigned to network interface cards or interfaces to find other computers on the internet So the big difference is that IP address looks for other computers while the transport layer port looks for applications
How long does a MAC address stay on a MAC address table
By default it stays on for 300 seconds Seems like you can probably change this in the switch seconds settings
What's the difference between a MAC address and a IP address?
The biggest difference is a MAC address is only relevant inside the local area network. While the IP address is more relevant when LANs are trying to connect to other LAN
What do pings do in Powershell?
Send a message to determine if its awake
Who is responsible for keeping track of the assignment of IP addresses, port numbers and domain names?
The Internet Assigned Numbers Authority It's pronounced I-Anna
How do you access the IP address of a connection in Windows
1.Go to the bottom right corner and right click 2.Go to Open Network. 3.And internet settings 4.Once you're in there 5.Click on Change Adapter options 6.Double click on the connection that you want to see 7.Select Details
What are two ways a device can get an IP address?
Assign a static IP address Configure the device to get a Dynamic IP Address from a DHCP server each time the device needs to connect to a network
What does APIPA stands for?
Automatic Private IP addressing
What's are Mac address hexadecimal numbers separated by
Colons.
What is the name of the second part of the MAC address
Extension identifier or Device ID
What layer on the OSI is the MAC address associated with
I think is associated with the second layer which is the data link layer.
What organization does I-Anna belong to?
ICANN
What are the two types of IP addresses?
IPv4 and IPv6
What's the difference between IPv4 and IPv6?
IPv6 has more addresses due to the issue with IPv4 running out
What manages Dynamic IP Addresses?
In dynamic hosts configure protocol
How does the switch confirm a MAC address?
It compares it to its MAC address table
How does a switch establish a MAC address table?
It examines whatever is plugged into its port and creates that table
What is the benefit of a switch constantly learning MAC addresses
It helps with efficiently and directing traffic on the network.
What is a FQDN? (Fully Qualified Domain Name)?
It made up of two parts, the host name and the domain name. The host name is the first part and a good example is www The domain name is the last part to like dot com
What is a node
It's a connection point on a network
What is a NIC?
It's a network interface card
What is a transport layer port?
It's a number assigned to a port. It helps the transport layer find applications
What is a Loopback address?
It's an address that allows us to determine if the network is working.
What is a interface?
It's the connection point where the computer meets the internet aka network interface card
What is a SLAAC on a network?
Its a IPv6 address that can not be saved to a MAC address table
What layer do routers function at?
Layer 3 Network Layer
What layer does the MAC address operate on?
Layer Two (Data Link)
What layer does the IP address operate on?
Layer three which is the transport layer
Is Hyper V a virtual machine?
No it gives us the ability to run virtual machines
If a network interface has a APIPA is that considered a configured IP address?
No, because it was established by the host.
What are the two parts that a subnet mask divides an IP address into?
Pt 1: The computer Pt 2: Identifies the network that the computer belongs to
What do switches use MAC addresses for?
To identify devices on the local area network
How can you find a manufacturer name by knowing if you know the MAC address?
Wireshark
Do MAC addresses expire on a MAC address table.
Yes, they do.
What is the issue with APIPA addresses?
You not able to communicate with these IP addresses